Kconfig 4.0 KB
Newer Older
M
Mathieu Desnoyers 已提交
1 2 3
#
# General architecture dependent options
#
4 5 6 7 8

config OPROFILE
	tristate "OProfile system profiling (EXPERIMENTAL)"
	depends on PROFILING
	depends on HAVE_OPROFILE
I
Ingo Molnar 已提交
9
	depends on TRACING_SUPPORT
I
Ingo Molnar 已提交
10 11
	select TRACING
	select RING_BUFFER
12
	select RING_BUFFER_ALLOW_SWAP
13 14 15 16 17 18 19
	help
	  OProfile is a profiling system capable of profiling the
	  whole system, include the kernel, kernel modules, libraries,
	  and applications.

	  If unsure, say N.

20 21 22 23 24 25 26 27
config OPROFILE_IBS
	bool "OProfile AMD IBS support (EXPERIMENTAL)"
	default n
	depends on OPROFILE && SMP && X86
	help
          Instruction-Based Sampling (IBS) is a new profiling
          technique that provides rich, precise program performance
          information. IBS is introduced by AMD Family10h processors
28
          (AMD Opteron Quad-Core processor "Barcelona") to overcome
29 30 31 32 33
          the limitations of conventional performance counter
          sampling.

	  If unsure, say N.

34 35 36 37 38 39 40 41 42 43 44 45
config OPROFILE_EVENT_MULTIPLEX
	bool "OProfile multiplexing support (EXPERIMENTAL)"
	default n
	depends on OPROFILE && X86
	help
	  The number of hardware counters is limited. The multiplexing
	  feature enables OProfile to gather more events than counters
	  are provided by the hardware. This is realized by switching
	  between events at an user specified time interval.

	  If unsure, say N.

46
config HAVE_OPROFILE
47
	bool
48 49 50 51 52 53 54 55 56 57 58 59

config KPROBES
	bool "Kprobes"
	depends on KALLSYMS && MODULES
	depends on HAVE_KPROBES
	help
	  Kprobes allows you to trap at almost any kernel address and
	  execute a callback function.  register_kprobe() establishes
	  a probepoint and specifies the callback.  Kprobes is useful
	  for kernel debugging, non-intrusive instrumentation and testing.
	  If in doubt, say "N".

60
config HAVE_EFFICIENT_UNALIGNED_ACCESS
61
	bool
62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78
	help
	  Some architectures are unable to perform unaligned accesses
	  without the use of get_unaligned/put_unaligned. Others are
	  unable to perform such accesses efficiently (e.g. trap on
	  unaligned access and require fixing it up in the exception
	  handler.)

	  This symbol should be selected by an architecture if it can
	  perform unaligned accesses efficiently to allow different
	  code paths to be selected for these cases. Some network
	  drivers, for example, could opt to not fix up alignment
	  problems with received packets if doing so would not help
	  much.

	  See Documentation/unaligned-memory-access.txt for more
	  information on the topic of unaligned memory accesses.

79 80 81
config HAVE_SYSCALL_WRAPPERS
	bool

82 83 84 85
config KRETPROBES
	def_bool y
	depends on KPROBES && HAVE_KRETPROBES

A
Avi Kivity 已提交
86 87 88 89 90 91 92
config USER_RETURN_NOTIFIER
	bool
	depends on HAVE_USER_RETURN_NOTIFIER
	help
	  Provide a kernel-internal notification when a cpu is about to
	  switch to user mode.

93
config HAVE_IOREMAP_PROT
94
	bool
95

96
config HAVE_KPROBES
97
	bool
98 99

config HAVE_KRETPROBES
100
	bool
101

102 103 104 105 106 107 108 109 110 111 112 113 114 115
#
# An arch should select this if it provides all these things:
#
#	task_pt_regs()		in asm/processor.h or asm/ptrace.h
#	arch_has_single_step()	if there is hardware single-step support
#	arch_has_block_step()	if there is hardware block-step support
#	asm/syscall.h		supplying asm-generic/syscall.h interface
#	linux/regset.h		user_regset interfaces
#	CORE_DUMP_USE_REGSET	#define'd in linux/elf.h
#	TIF_SYSCALL_TRACE	calls tracehook_report_syscall_{entry,exit}
#	TIF_NOTIFY_RESUME	calls tracehook_notify_resume()
#	signal delivery		calls tracehook_signal_handler()
#
config HAVE_ARCH_TRACEHOOK
116
	bool
117

118
config HAVE_DMA_ATTRS
119
	bool
120 121

config USE_GENERIC_SMP_HELPERS
122
	bool
123

124 125
config HAVE_REGS_AND_STACK_ACCESS_API
	bool
126 127 128 129 130
	help
	  This symbol should be selected by an architecure if it supports
	  the API needed to access registers and stack entries from pt_regs,
	  declared in asm/ptrace.h
	  For example the kprobes-based event tracer needs this API.
131

132
config HAVE_CLK
133
	bool
134 135 136 137
	help
	  The <linux/clk.h> calls support software clock gating and
	  thus are a key power management tool on many systems.

J
Joerg Roedel 已提交
138 139
config HAVE_DMA_API_DEBUG
	bool
140 141 142

config HAVE_DEFAULT_NO_SPIN_MUTEXES
	bool
143 144 145

config HAVE_HW_BREAKPOINT
	bool
146
	depends on PERF_EVENTS
147

A
Avi Kivity 已提交
148 149
config HAVE_USER_RETURN_NOTIFIER
	bool
150

151
source "kernel/gcov/Kconfig"